558 lines
17 KiB
C
558 lines
17 KiB
C
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
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**
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** $Id$
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**/
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#include "common.h"
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#include "structs.h"
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#include "output.h"
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#include "decoder.h"
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#ifndef FIXED_POINT
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#define FLOAT_SCALE (1.0f/(1<<15))
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#define DM_MUL REAL_CONST(0.3203772410170407) // 1/(1+sqrt(2) + 1/sqrt(2))
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#define RSQRT2 REAL_CONST(0.7071067811865475244) // 1/sqrt(2)
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static INLINE real_t get_sample(real_t **input, uint8_t channel, uint16_t sample,
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uint8_t down_matrix, uint8_t *internal_channel)
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{
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if (!down_matrix)
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return input[internal_channel[channel]][sample];
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if (channel == 0)
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{
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return DM_MUL * (input[internal_channel[1]][sample] +
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input[internal_channel[0]][sample] * RSQRT2 +
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input[internal_channel[3]][sample] * RSQRT2);
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} else {
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return DM_MUL * (input[internal_channel[2]][sample] +
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input[internal_channel[0]][sample] * RSQRT2 +
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input[internal_channel[4]][sample] * RSQRT2);
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}
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}
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#ifndef HAS_LRINTF
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#define CLIP(sample, max, min) \
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if (sample >= 0.0f) \
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{ \
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sample += 0.5f; \
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if (sample >= max) \
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sample = max; \
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} else { \
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sample += -0.5f; \
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if (sample <= min) \
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sample = min; \
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}
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#else
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#define CLIP(sample, max, min) \
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if (sample >= 0.0f) \
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{ \
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if (sample >= max) \
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sample = max; \
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} else { \
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if (sample <= min) \
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sample = min; \
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}
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#endif
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#define CONV(a,b) ((a<<1)|(b&0x1))
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static void to_PCM_16bit(NeAACDecHandle hDecoder, real_t **input,
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uint8_t channels, uint16_t frame_len,
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int16_t **sample_buffer)
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{
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uint8_t ch, ch1;
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uint16_t i;
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switch (CONV(channels,hDecoder->downMatrix))
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{
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case CONV(1,0):
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case CONV(1,1):
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = input[hDecoder->internal_channel[0]][i];
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CLIP(inp, 32767.0f, -32768.0f);
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(*sample_buffer)[i] = (int16_t)lrintf(inp);
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}
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break;
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case CONV(2,0):
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if (hDecoder->upMatrix)
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{
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ch = hDecoder->internal_channel[0];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch][i];
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CLIP(inp0, 32767.0f, -32768.0f);
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(*sample_buffer)[(i*2)+0] = (int16_t)lrintf(inp0);
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(*sample_buffer)[(i*2)+1] = (int16_t)lrintf(inp0);
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}
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} else {
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ch = hDecoder->internal_channel[0];
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ch1 = hDecoder->internal_channel[1];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch ][i];
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real_t inp1 = input[ch1][i];
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CLIP(inp0, 32767.0f, -32768.0f);
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CLIP(inp1, 32767.0f, -32768.0f);
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(*sample_buffer)[(i*2)+0] = (int16_t)lrintf(inp0);
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(*sample_buffer)[(i*2)+1] = (int16_t)lrintf(inp1);
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}
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}
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break;
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default:
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for (ch = 0; ch < channels; ch++)
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{
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->internal_channel);
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CLIP(inp, 32767.0f, -32768.0f);
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(*sample_buffer)[(i*channels)+ch] = (int16_t)lrintf(inp);
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}
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}
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break;
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}
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}
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static void to_PCM_24bit(NeAACDecHandle hDecoder, real_t **input,
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uint8_t channels, uint16_t frame_len,
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int32_t **sample_buffer)
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{
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uint8_t ch, ch1;
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uint16_t i;
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switch (CONV(channels,hDecoder->downMatrix))
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{
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case CONV(1,0):
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case CONV(1,1):
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = input[hDecoder->internal_channel[0]][i];
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inp *= 256.0f;
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CLIP(inp, 8388607.0f, -8388608.0f);
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(*sample_buffer)[i] = (int32_t)lrintf(inp);
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}
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break;
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case CONV(2,0):
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if (hDecoder->upMatrix)
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{
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ch = hDecoder->internal_channel[0];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch][i];
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inp0 *= 256.0f;
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CLIP(inp0, 8388607.0f, -8388608.0f);
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(*sample_buffer)[(i*2)+0] = (int32_t)lrintf(inp0);
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(*sample_buffer)[(i*2)+1] = (int32_t)lrintf(inp0);
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}
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} else {
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ch = hDecoder->internal_channel[0];
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ch1 = hDecoder->internal_channel[1];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch ][i];
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real_t inp1 = input[ch1][i];
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inp0 *= 256.0f;
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inp1 *= 256.0f;
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CLIP(inp0, 8388607.0f, -8388608.0f);
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CLIP(inp1, 8388607.0f, -8388608.0f);
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(*sample_buffer)[(i*2)+0] = (int32_t)lrintf(inp0);
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(*sample_buffer)[(i*2)+1] = (int32_t)lrintf(inp1);
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}
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}
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break;
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default:
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for (ch = 0; ch < channels; ch++)
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{
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->internal_channel);
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inp *= 256.0f;
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CLIP(inp, 8388607.0f, -8388608.0f);
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(*sample_buffer)[(i*channels)+ch] = (int32_t)lrintf(inp);
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}
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}
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break;
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}
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}
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static void to_PCM_32bit(NeAACDecHandle hDecoder, real_t **input,
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uint8_t channels, uint16_t frame_len,
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int32_t **sample_buffer)
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{
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uint8_t ch, ch1;
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uint16_t i;
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switch (CONV(channels,hDecoder->downMatrix))
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{
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case CONV(1,0):
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case CONV(1,1):
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = input[hDecoder->internal_channel[0]][i];
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inp *= 65536.0f;
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CLIP(inp, 2147483647.0f, -2147483648.0f);
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(*sample_buffer)[i] = (int32_t)lrintf(inp);
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}
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break;
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case CONV(2,0):
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if (hDecoder->upMatrix)
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{
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ch = hDecoder->internal_channel[0];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch][i];
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inp0 *= 65536.0f;
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CLIP(inp0, 2147483647.0f, -2147483648.0f);
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(*sample_buffer)[(i*2)+0] = (int32_t)lrintf(inp0);
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(*sample_buffer)[(i*2)+1] = (int32_t)lrintf(inp0);
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}
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} else {
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ch = hDecoder->internal_channel[0];
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ch1 = hDecoder->internal_channel[1];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch ][i];
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real_t inp1 = input[ch1][i];
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inp0 *= 65536.0f;
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inp1 *= 65536.0f;
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CLIP(inp0, 2147483647.0f, -2147483648.0f);
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CLIP(inp1, 2147483647.0f, -2147483648.0f);
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(*sample_buffer)[(i*2)+0] = (int32_t)lrintf(inp0);
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(*sample_buffer)[(i*2)+1] = (int32_t)lrintf(inp1);
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}
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}
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break;
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default:
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for (ch = 0; ch < channels; ch++)
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{
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->internal_channel);
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inp *= 65536.0f;
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CLIP(inp, 2147483647.0f, -2147483648.0f);
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(*sample_buffer)[(i*channels)+ch] = (int32_t)lrintf(inp);
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}
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}
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break;
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}
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}
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static void to_PCM_float(NeAACDecHandle hDecoder, real_t **input,
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uint8_t channels, uint16_t frame_len,
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float32_t **sample_buffer)
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{
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uint8_t ch, ch1;
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uint16_t i;
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switch (CONV(channels,hDecoder->downMatrix))
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{
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case CONV(1,0):
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case CONV(1,1):
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = input[hDecoder->internal_channel[0]][i];
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(*sample_buffer)[i] = inp*FLOAT_SCALE;
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}
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break;
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case CONV(2,0):
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if (hDecoder->upMatrix)
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{
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ch = hDecoder->internal_channel[0];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch][i];
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(*sample_buffer)[(i*2)+0] = inp0*FLOAT_SCALE;
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(*sample_buffer)[(i*2)+1] = inp0*FLOAT_SCALE;
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}
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} else {
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ch = hDecoder->internal_channel[0];
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ch1 = hDecoder->internal_channel[1];
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for(i = 0; i < frame_len; i++)
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{
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real_t inp0 = input[ch ][i];
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real_t inp1 = input[ch1][i];
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(*sample_buffer)[(i*2)+0] = inp0*FLOAT_SCALE;
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(*sample_buffer)[(i*2)+1] = inp1*FLOAT_SCALE;
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}
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}
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break;
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default:
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for (ch = 0; ch < channels; ch++)
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{
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->internal_channel);
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(*sample_buffer)[(i*channels)+ch] = inp*FLOAT_SCALE;
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}
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}
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break;
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}
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}
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static void to_PCM_double(NeAACDecHandle hDecoder, real_t **input,
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uint8_t channels, uint16_t frame_len,
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double **sample_buffer)
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{
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uint8_t ch, ch1;
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uint16_t i;
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switch (CONV(channels,hDecoder->downMatrix))
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{
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case CONV(1,0):
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case CONV(1,1):
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for(i = 0; i < frame_len; i++)
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{
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real_t inp = input[hDecoder->internal_channel[0]][i];
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(*sample_buffer)[i] = (double)inp*FLOAT_SCALE;
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}
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break;
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case CONV(2,0):
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if (hDecoder->upMatrix)
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{
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ch = hDecoder->internal_channel[0];
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||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
real_t inp0 = input[ch][i];
|
||
|
|
(*sample_buffer)[(i*2)+0] = (double)inp0*FLOAT_SCALE;
|
||
|
|
(*sample_buffer)[(i*2)+1] = (double)inp0*FLOAT_SCALE;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
ch = hDecoder->internal_channel[0];
|
||
|
|
ch1 = hDecoder->internal_channel[1];
|
||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
real_t inp0 = input[ch ][i];
|
||
|
|
real_t inp1 = input[ch1][i];
|
||
|
|
(*sample_buffer)[(i*2)+0] = (double)inp0*FLOAT_SCALE;
|
||
|
|
(*sample_buffer)[(i*2)+1] = (double)inp1*FLOAT_SCALE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
for (ch = 0; ch < channels; ch++)
|
||
|
|
{
|
||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
real_t inp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->internal_channel);
|
||
|
|
(*sample_buffer)[(i*channels)+ch] = (double)inp*FLOAT_SCALE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void *output_to_PCM(NeAACDecHandle hDecoder,
|
||
|
|
real_t **input, void *sample_buffer, uint8_t channels,
|
||
|
|
uint16_t frame_len, uint8_t format)
|
||
|
|
{
|
||
|
|
int16_t *short_sample_buffer = (int16_t*)sample_buffer;
|
||
|
|
int32_t *int_sample_buffer = (int32_t*)sample_buffer;
|
||
|
|
float32_t *float_sample_buffer = (float32_t*)sample_buffer;
|
||
|
|
double *double_sample_buffer = (double*)sample_buffer;
|
||
|
|
|
||
|
|
#ifdef PROFILE
|
||
|
|
int64_t count = faad_get_ts();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Copy output to a standard PCM buffer */
|
||
|
|
switch (format)
|
||
|
|
{
|
||
|
|
case FAAD_FMT_16BIT:
|
||
|
|
to_PCM_16bit(hDecoder, input, channels, frame_len, &short_sample_buffer);
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_24BIT:
|
||
|
|
to_PCM_24bit(hDecoder, input, channels, frame_len, &int_sample_buffer);
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_32BIT:
|
||
|
|
to_PCM_32bit(hDecoder, input, channels, frame_len, &int_sample_buffer);
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_FLOAT:
|
||
|
|
to_PCM_float(hDecoder, input, channels, frame_len, &float_sample_buffer);
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_DOUBLE:
|
||
|
|
to_PCM_double(hDecoder, input, channels, frame_len, &double_sample_buffer);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef PROFILE
|
||
|
|
count = faad_get_ts() - count;
|
||
|
|
hDecoder->output_cycles += count;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return sample_buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define DM_MUL FRAC_CONST(0.3203772410170407) // 1/(1+sqrt(2) + 1/sqrt(2))
|
||
|
|
#define RSQRT2 FRAC_CONST(0.7071067811865475244) // 1/sqrt(2)
|
||
|
|
|
||
|
|
static INLINE real_t get_sample(real_t **input, uint8_t channel, uint16_t sample,
|
||
|
|
uint8_t down_matrix, uint8_t up_matrix,
|
||
|
|
uint8_t *internal_channel)
|
||
|
|
{
|
||
|
|
if (up_matrix == 1)
|
||
|
|
return input[internal_channel[0]][sample];
|
||
|
|
|
||
|
|
if (!down_matrix)
|
||
|
|
return input[internal_channel[channel]][sample];
|
||
|
|
|
||
|
|
if (channel == 0)
|
||
|
|
{
|
||
|
|
real_t C = MUL_F(input[internal_channel[0]][sample], RSQRT2);
|
||
|
|
real_t L_S = MUL_F(input[internal_channel[3]][sample], RSQRT2);
|
||
|
|
real_t cum = input[internal_channel[1]][sample] + C + L_S;
|
||
|
|
return MUL_F(cum, DM_MUL);
|
||
|
|
} else {
|
||
|
|
real_t C = MUL_F(input[internal_channel[0]][sample], RSQRT2);
|
||
|
|
real_t R_S = MUL_F(input[internal_channel[4]][sample], RSQRT2);
|
||
|
|
real_t cum = input[internal_channel[2]][sample] + C + R_S;
|
||
|
|
return MUL_F(cum, DM_MUL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void* output_to_PCM(NeAACDecHandle hDecoder,
|
||
|
|
real_t **input, void *sample_buffer, uint8_t channels,
|
||
|
|
uint16_t frame_len, uint8_t format)
|
||
|
|
{
|
||
|
|
uint8_t ch;
|
||
|
|
uint16_t i;
|
||
|
|
int16_t *short_sample_buffer = (int16_t*)sample_buffer;
|
||
|
|
int32_t *int_sample_buffer = (int32_t*)sample_buffer;
|
||
|
|
|
||
|
|
/* Copy output to a standard PCM buffer */
|
||
|
|
for (ch = 0; ch < channels; ch++)
|
||
|
|
{
|
||
|
|
switch (format)
|
||
|
|
{
|
||
|
|
case FAAD_FMT_16BIT:
|
||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
int32_t tmp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->upMatrix,
|
||
|
|
hDecoder->internal_channel);
|
||
|
|
if (tmp >= 0)
|
||
|
|
{
|
||
|
|
tmp += (1 << (REAL_BITS-1));
|
||
|
|
if (tmp >= REAL_CONST(32767))
|
||
|
|
{
|
||
|
|
tmp = REAL_CONST(32767);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
tmp += -(1 << (REAL_BITS-1));
|
||
|
|
if (tmp <= REAL_CONST(-32768))
|
||
|
|
{
|
||
|
|
tmp = REAL_CONST(-32768);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
tmp >>= REAL_BITS;
|
||
|
|
short_sample_buffer[(i*channels)+ch] = (int16_t)tmp;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_24BIT:
|
||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
int32_t tmp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->upMatrix,
|
||
|
|
hDecoder->internal_channel);
|
||
|
|
if (tmp >= 0)
|
||
|
|
{
|
||
|
|
tmp += (1 << (REAL_BITS-9));
|
||
|
|
tmp >>= (REAL_BITS-8);
|
||
|
|
if (tmp >= 8388607)
|
||
|
|
{
|
||
|
|
tmp = 8388607;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
tmp += -(1 << (REAL_BITS-9));
|
||
|
|
tmp >>= (REAL_BITS-8);
|
||
|
|
if (tmp <= -8388608)
|
||
|
|
{
|
||
|
|
tmp = -8388608;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
int_sample_buffer[(i*channels)+ch] = (int32_t)tmp;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_32BIT:
|
||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
int32_t tmp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->upMatrix,
|
||
|
|
hDecoder->internal_channel);
|
||
|
|
if (tmp >= 0)
|
||
|
|
{
|
||
|
|
tmp += (1 << (16-REAL_BITS-1));
|
||
|
|
tmp <<= (16-REAL_BITS);
|
||
|
|
} else {
|
||
|
|
tmp += -(1 << (16-REAL_BITS-1));
|
||
|
|
tmp <<= (16-REAL_BITS);
|
||
|
|
}
|
||
|
|
int_sample_buffer[(i*channels)+ch] = (int32_t)tmp;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case FAAD_FMT_FIXED:
|
||
|
|
for(i = 0; i < frame_len; i++)
|
||
|
|
{
|
||
|
|
real_t tmp = get_sample(input, ch, i, hDecoder->downMatrix, hDecoder->upMatrix,
|
||
|
|
hDecoder->internal_channel);
|
||
|
|
int_sample_buffer[(i*channels)+ch] = (int32_t)tmp;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return sample_buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|